# Orthogonal Daily Soil Moisture API

> Orthogonal Daily Soil Moisture API is a paid API for AI agents from x402.orthogonal.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Returns daily soil moisture percentage relative to field holding capacity at 0–10 cm depth for one or more geographic coordinates over a date range

## Facts

- Endpoint: GET https://x402.orthogonal.com/precip/api/v1/soil-moisture-daily
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/orthogonal-daily-soil-moisture-api-b40d57fc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6I_kOaxJEAGjAa1QvGhv0

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability orthogonal-daily-soil-moisture-api-b40d57fc
```

Example prompt: Can you pull the daily soil moisture percentage at 0–10 cm depth for my farm at latitude 37.7575, longitude -122.4262, from June 1 to June 30, 2025, using the America/Chicago timezone?

## When to prefer this

Choose this endpoint when you need soil moisture data specifically at the shallow 0–10 cm depth layer on a daily granularity for one or more precise lat/lon points. It is ideal for agricultural planning, irrigation scheduling, and environmental monitoring workflows where volumetric or relative soil wetness is required. Prefer this over general weather APIs that only provide precipitation data but not actual soil moisture content.

## Known failure modes

- Missing or invalid latitude/longitude coordinates returns an error
- Date range outside available data coverage returns empty or partial results
- Malformed date format (non-ISO) may cause a parsing error
- Unsupported timeZoneId string may cause incorrect date alignment or an error
- Requesting too many coordinate pairs simultaneously may degrade response or fail
- Payment failure (x402 protocol) results in HTTP 402 and no data returned

## How this service works

Daily soil moisture percentage relative to holding capacity at 0-10cm depth | ERROR: Unable to calculate price.

## Output

Returns a time series of daily soil moisture values expressed as a percentage relative to field water holding capacity at the 0–10 cm depth layer, indexed by date and geographic coordinate. Multiple locations can be queried simultaneously, and results are returned in JSON format.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "end": {
       "type": "string",
       "default": "2025-06-30",
       "example": "2025-06-30"
      },
      "start": {
       "type": "string",
       "default": "2025-06-01",
       "example": "2025-06-01"
      },
      "format": {
       "type": "string",
       "default": "json"
      },
      "latitude": {
       "type": "string",
       "default": "37.75750,42.35355,29.97991",
       "example": "37.75750,42.35355,29.97991"
      },
      "longitude": {
       "type": "string",
       "default": "-122.42616,-71.06053,-90.07447",
       "example": "-122.42616,-71.06053,-90.07447"
      },
      "timeZoneId": {
       "type": "string",
       "default": "America/Chicago"
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/orthogonal-daily-soil-moisture-api-b40d57fc/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.orthogonal.com](https://www.zero.xyz/host/x402.orthogonal.com/llms.txt)